中文摘要：

为了探讨棉花光合作用及相关生理性状的遗传规律，利用四交分离作图群体泗棉3号／苏12／／中4133／8891的273个F2：3家系为材料，用MAPQTL5．0软件及区间作图方法（IM），对棉花叶绿素含量及光合速率进行了QTL分析。检测到3个与叶绿素含量相关的QTL，分别位于染色体D6、D8和A10，解释性状表型变异的4．3％，4．5％和5．2％。检测到3个与光合速率相关的QTL，位于D5、D6和A11染色体，解释性状表型变异的3．8％，7．4％和8．4％。两个性状所有QTL的遗传效应均以加性效应为主。本研究定位的棉花叶绿素含量和光合速率QTL均是首次报道，可尝试应用于高光效育种的分子标记辅助选择。

英文摘要：

In order to explore the genetic basis for photosynthesis and its related physiological trait of cotton, a mapping population of 273 F2：3 inbred lines derived from a four-way cross of Simian 3/Sumian 12//Zhong 4133/8891 was employed to map quantitative trait loci （QTL） of leaf chlorophyll content and photosynthetic rates in cotton by interval mapping method with MAPQTL5.0. The results showed that a total of three QTLs were detected for leaf chlorophyll content on chromosome D6, D8 and A10, respectively, which explained 4.3% ,4.5% and 5.2% of the phenotypic variance, and a total of three QTLs were detected for photosynthetic rates on chromosome D5,D6 and All, respectively, which explained 3.8 %, 7.4 % and 8.4% of the phenotypie variance. Additive effects were mainly genetics effects for all QTLs of two traits. These QTLs concerned with leaf chlorophyll content and photosynthetic rates in cotton were first reported, and these results should be very useful for markerassisted selection in cotton high photosynthetic rates breeding program.